20015919

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1699}}^1$

素因数の和:1740

約数の個数: 48

約数和(自身を含む): 38188800

約数和(自身を除く): 18172881

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 153, 187, 231, 357, 561, 693, 1071, 1309, 1683, 1699, 3927, 5097, 11781, 11893, 15291, 18689, 28883, 35679, 56067, 86649, 107037, 130823, 168201, 202181, 259947, 317713, 392469, 606543, 953139, 1177407, 1819629, 2223991, 2859417, 6671973, 20015919]

約数ペア:

[(1, 20015919), (3, 6671973), (7, 2859417), (9, 2223991), (11, 1819629), (17, 1177407), (21, 953139), (33, 606543), (51, 392469), (63, 317713), (77, 259947), (99, 202181), (119, 168201), (153, 130823), (187, 107037), (231, 86649), (357, 56067), (561, 35679), (693, 28883), (1071, 18689), (1309, 15291), (1683, 11893), (1699, 11781), (3927, 5097)]